The Role of Furniture, Walls, and Ceilings in Sound Control

The sound in a room depends heavily on its size, shape, and the materials or surfaces within it. Large rooms allow sound waves to develop, leading to long reverberation times, while smaller spaces can resonate, producing a hollow or boxy sound. While the physical size and shape of a room can rarely be adjusted, there are ways to reflect, absorb, and diffuse sound to improve sound quality.

The Role of Engineered Furniture in Sound Control

Furniture is a fundamental, yet often overlooked, component in achieving total sound control. While standard office pieces are typically reflective, causing sound to bounce and create a cluttered acoustic environment, identifying sufficient vertical surfaces for acoustic processing can transform a space. By identifying surfaces such as modesty panels, cabinet doors, and cabinetry, RPG can apply acoustic processing to turn everyday office equipment into active tools for sound control.

The core of this advancement is SoniQ™ technology, which converts normally reflective wood surfaces into absorptive ones. Unlike random bookshelves or dividers that provide only incidental benefits, furniture integrated with SoniQ™ technology is engineered and laboratory-tested to meet specific reverberation goals. For example, while the reverberation time goal for an office environment is less than 1/2 second, typical furniture and even absorptive ceiling tiles often fail to meet this target on their own. A space equipped with SoniQ™ technology can achieve this goal effectively without additional intrusive wall treatments.

When designing a space, aesthetics should not be a trade-off for performance. Standard wood office furniture looks identical to pieces processed with SoniQ™ technology, but the difference in absorption—measured in Sabins—is significant across and beyond the normal speech range. By processing vertical surfaces exposed to the environment, every component of a workstation, including both sides of a modesty panel, can contribute to the room's sound-absorbing performance.

Ultimately, the goal is to create a workspace where noise reverberation is minimized and clarity is maximized. By using these engineered surfaces, you can effectively eliminate the need for wall panels while maintaining the professional look of high-end wood furniture.

The Role of Walls in Sound Control

The walls of a room act as primary sound barriers and constitute the largest surface area for managing a room's acoustic profile. They can block noise, absorb waves, and reduce the transmission of unwanted sound. High-performance acoustical wall systems utilize three primary methods to master the sonic environment: blocking, absorption, and diffusion.

Blocking Transmission

Concrete and masonry walls act as strong barriers that stop sound waves from passing into adjacent rooms. Sheetrock walls are not as strong; they often require support from isolation systems and, in some cases, additional layers to create a stronger barrier.

Absorption

Standard solid walls are often too reflective, contributing to excessive reverberation. Modern acoustical wall systems solve this by using engineered absorptive panels like the Perfecto®, Dado™, or Expo™ series. These systems use precise perforations or grooves to "soak up" sound energy. For example, the Perfecto® Micro can achieve an NRC=0.95, effectively eliminating echoes while appearing as a solid, high-end wood finish. For more demanding environments, systems like the Absorbor™ Hi-Impact provide the necessary durability and tackability without sacrificing performance.

Diffusion and Scattering

Rather than just stopping sound, advanced acoustical wall systems use diffusion to scatter sound waves, creating a uniform sound field and a natural sense of ambiance. This is achieved through geometric designs and number-theory-based patterns and is used in meeting rooms and halls for presentations.

1D Diffusers: Products like the QRD® 734 or FlutterFree® use vertical wells and ribs to produce a directional response.
2D Diffusers: The Skyline® system uses unique block heights to scatter incident sound uniformly in all directions, minimizing "acoustic glare" in smaller spaces.
Hybrid Systems: The BAD™ (Binary Amplitude Diffuser) panel combines an optimized binary pattern of perforations with a sound-absorbent core to provide an ideal transition from absorption to scattering.

By integrating these specialized acoustical wall systems, designers can achieve specific reverberation and performance goals—far more effectively than through standard construction alone.

The Role of Ceilings in Sound Control

When you enter a room, looking up may be the last thing that you do. But if the room echoes or the sound reverberates oddly, the ceiling may be to blame. Ceiling tiles and panels absorb sound waves, preventing them from bouncing off hard, flat surfaces. This reduces echo and reverberation.

Ceilings can also be essential in soundproofing between floors. In an office building, specialized ceiling treatment may be necessary to prevent employees at their desks from hearing footsteps from people above. Reducing noise pollution can increase employees’ productivity levels. Also, ceilings can minimize background noise and echoes, which are important for speech intelligibility in classrooms, conference rooms, and offices.

Ceilings are often underutilized for acoustic treatments; however, various options can improve acoustics. Acoustic ceiling panels can be mounted directly to the ceiling, while clouds can be suspended horizontally and absorb sound from multiple directions.

Acoustic baffles are vertical panels suspended from the ceiling, offering another deflector for sound waves to bounce off. Acoustic tiles are designed to fit into standard drop ceiling grids and can replace existing ceiling tiles. This is a seamless and relatively low-effort acoustic treatment.

Tips for Building and Designing an Acoustically Sound Space

Building and designing an acoustically sound space requires a mix of treatments. Acoustic panels, thick, plush curtains, and rugs can reduce echoes and reverberations. Sound diffusers can scatter sound waves, creating a more natural sound. Ceiling panels and acoustic tiles can also manage reflections from above — a necessary treatment for large spaces, including audio listening rooms, concert venues, and amphitheaters.